Coffee-pot.



No. 772,481. PATENTBD OCT. 18, 1904 D. H. TALBERT.

COFFEE POT.

APPLICATION FILED FEB. 17. 1904.

I N0 MODEL.

2 SHEETS-SHEET 1.

@AHOFDQyS No. 772,481. PATENTED OCT. 18.1904.

D. H. TALBERT.

COFFEE POT.

APPLICATION rum) FEB. 17. 1904.

N0 MODEL, 2 SHEETS-SHEBT 2.

v venientlyand easily handled both in filling it Patented October 18,1904.

UNIT D STATES P TENT OFFICE.

DANIEL H. TALBFRT, OF INDIANAPOLIS, INDIANA.

COFFEE-POT.

SPECIFICATION forming part of Letters Patent No; 7,7 2,481, datedOctober 18, 1904.

Application filed February 1'7, 1904. Serial No. 194,086- (No model.)

tion.

This invention relates to coffee-pots, and has for its principal objectthe provision of an improved type of coffee-pot in which means isprovided for effectively retaining the heat within the pot for a longperiod of time, in which means is provided for facilitating thepercolation of hot water through the charge of coffee, in whichthereceiver for the ground coffee is so constructed as to bereadilyremovable from the coffee pot, and to be conwith fresh coflee andin removing spent coffee and cleansing the receiver after use.

With the objects above mentioned and others in view which will behereinafter pointed out, I make use of the novel coffee-pot con-.

structionhereinafterfully described and claimed, and illustrated in twosomewhat different forms of embodiment in the accompanying drawings, itbeing understood that various changes in the minor structural detailsmay be made without departing from. the

spirit of the invention or sacrificing the advantages thereof.

In the drawings, Figure 1 is a view in vertical section through theimproved coffee-pot. Fig. 2 is a detail view. Fig. 3 is a view invertical section of a modified form of the invention adapted to serve asan attachment to coifee-urns of ordinary structure.

Referring to the drawings, in'which corresponding parts are designatedby similar characters of reference, 1 designates the outer cas ing orjacket of the c0ffee-pot, which ismade of any suitable material, such assome noncorrodible metal, and is preferably of the cyllndrical formillustrated. the back of the casing. or jacket 1 I provide a filler 2,through which liquid may be poured into the interior of the casing orjacket, and a cover 8 ing 1 the usual removable cover for-the potfee-Pot, of which the following is a specificaisprovided, as shown at4:, and a handle 5 is attached at its lower end to the casing-wall andat its upper end to the filler 2-. Within the outer casing or jacket 1and spaced therefrom at a sufficient interval I arrange an innercoffee-receptacle 6, which preferably corresponds approximately incontour to the outer casing or jacket and extends from a plane slightlybelow the. cover of the coffee-pot almost to the bottom thereof, beingspaced from the bottomto a sufficient extent in order to permit a layerof heated liquid for heat-retaining purposes-to be interposed betweenthe inner receptacle and the outer casing. The inner receptacle 6 ispreferably enamel or porcelain lined, and at the top the side wallof thereceptacle 6 is provided with an outward flange 7, which is secured tothe wall of the casing or jacket 1..

The spout of the coffee-pot appears, as seen from the outside, to be ofthe ordinary construction, but, as may be seen in Fig. 1, it is reallycomposed of an outer wall 8 and an inner tube 9. The outer wall 8, whichtapers considerabl y toward the upper end, is attached at its inner endto the wall of the casing 1, and the interior of the casing communicateswith the space inclosed by the wall 8. The tube 9 is of substantiallythe same diameter throughout its length and is attached at its inner endto the inner receptacle 6, with the interior of which the tubecommunicates. The outer end of the tube ishermetically sealed by solderor otherwise to the outer end of the wall 8.

t The preferred form of receiver or percolator for the coffee is thatillustrated in Fig. 1, and it consists of a metal receiver 10, reducedin diameter near the bottom to present a shoulder 11, adapted to restupon the flange 7 of the receptacle ;6 and having a perforated metalplate 12 secured to the receiver near the bot bottom for the receiverwhich consists, pref-' erably, of a piece of cloth 14:, of any suitablecharacter,which is carried by a band 15, preferably of metal, adapted toencircle and engage frictionally with the exterior surface of thereceiver at its lower end, as seen in Fig. 1.

In order to facilitate the passage of the hot water from the upperportion of the receiver through the charge of coffee and into thecoffee-receptacle in the lower portion of the pot, a small tube 16 isprovided at one side of the coffee-receiver, the upper end of the tubebeing substantially at the top of the receiver and the lower end openingbelow the percolator-plate, so as to afford an unobstructed passage forair from the receptacle 6 to the top of the receiver. By means of thistubular passage the resistance which would otherwise be opposed to thedownward passage of the hot water by the air in the receptacle 6 isentirely overcome, and the pressure of the air in the receptacle 6 andin the upper part of the coffee-receiver is equalized.

While the layer of hot water between the outer casing or jacket of thecoffee-pot and the inner receptacle 6 is effective to retain the heat inthe infusion of coffeewithin the receptacle 6, this layer of hot waterdoes not, of course, prevent the escape of heat from the hot water inthe coffee-receptacle. In order to prevent loss of heat from the waterin the coffee-receptacle, it is desirable to provide an outer coveringor wrapping of asbestos 17 around the upper portion of the receiver. Thelayer of asbestos does not interfere with the introduction or removal ofthe receiver and is of great utility in preventing radiation of heatfrom the receiver.

In addition to the structures above described it is desirable to includein the coffee-pot means for indicating the level of the liquid in thespace between the outer casing or jacket 1 and the inner receptacle 6.The preferred form of indicating means consists of a small float 18 anda light and slender stem 19, of wire or other material, which extendsupward through a small opening in the cover over the filler 2 of theouter casing.

In the modified form of the invention illustrated in Fig. 3 l haveprovided an attachment adapted for use with coffee-urns of ordinaryconstruction in which the coffee-receptacle is separated from the outerwall of the casing by a space for the reception of hot water to serve asa heat-retainer and to protect the infusion of eofiee from the action offire. The outer casing or jacket of the urn is indicated at 20, and theinner coffee-receptacle,

which is preferably of earthenware, as usual,

is shown at 21. An annulus extends outward from the top of the innerreceptacle 21, as shown at 22, forming a cover over the space betweenthe inner receptacle and the outer casing-wall and extended upward andoutward beyond the outer casing-wall to form a seat for the attachment,generally indicated at 23. The attachment 23 is similar in many respectsto the receiver described above and consists the fabric taut.

of an upper portion 24 of the same or slightly largerdiameter than thatof the coffee-urn and a lower reduced portion 25, which forms thereceptacle for the charge of coffee. The upper portion 24 of thereceiver is separated from the lower portion by a perforatedpercolator-plate 26, the openings in the plate being very small toinsure slow passage of the water through the charge of coffee, and atone side a tube 27 extends downward from the top of the receiver andterminates beneath the percolator-plate, as shown. The lower section 25of the receiver is open at the bottom, like the receiver abovedescribed, and is provided with a removable bottom consisting of a pieceof fabric 28 and a supporting-band 29, of metal, upon which the fabricis secured. The band 29 is adapted to embrace the lower portion of thereceiver quite closely and hold At the top of the receiver a cover 30 ofordinary form is provided, and in order to prevent the radiation of heatfrom the receiver a layer of asbestos 31 is arranged outside of theupper portion of the receiver, as shown. The inner portion of thereceiver or receiver proper is preferably made of blocktin on account ofits non-corrosive qualities. In using either form of embodiment of theinvention the receiver must be charged with coffee by first removing thefabric bottom from the receiver and filling the space below thepercolator-plate, the receiver being inverted for that purpose. Thespace below the pereolator-plate having been supplied with the desiredamount of ground coffee the bottom will be fitted upon the receiver andheld in place by means of the elasticity of the band upon which thefabric is secured. The fabric being drawn taut by contact with the lowermargin of the receiver affords a large area for the escape of theinfusion of coffee and keeps the ground coffee spread out in a layer ofapproximately uniform thiekness, so insuring thorough action of the hotwater upon the ground coffee. As the openings in the percolator-plateare always very small, the rate of passage of water through thepercolatorplate and through the ground coffee is slow, so slow, indeed,that as a rule the full strength and aroma of the coffee are exhaustedby the hot water in one passage through the ground coffee. The infusionformed by the passage of the hot water through the coffee passes downthrough the cloth bottom of the receiver into the receptacle below,whether that receptacle be a part of an ordinary coffee-urn or of theimproved coffee-pot first described.

By arranging the ground coffee in a layer of approximately uniformthickness throughout and presenting a large area for the entrance of hotwater into the charge of coffee the action of hot water throughout allparts of the charge is insured and a more uniform exhaustion of theground coffee is obtained than with the bags and conical receivers com-I of the liquid in the space between the outer monly employed. Theinfusion of coifee which passes downward into the receptacle in thelower portion ofthe pot or urnv maybe kept hot indefinitely by the hotwater provided between said receptacle and the outer casing of the potor urn Without danger of burning the colfee through the direct exposurethereof to the'heat of the flame by whichthe water is heated. In theform of the invention first described the protection of the infusion ofcoffee within the pot from cooling is most effective. Even the radiationfrom the small vented by the layer of hot water which surrounds theinner tube of the spout.

As little or no opportunity is given for the escape ofsteam from thespace between the outer wall and the inner coffee-receptacle, thequantity, of water between the casing-wall and receptacle is diminishedvery slowly and replenishment is seldom necessary. The level Wall andthe'inner receptacle is always clearly indicated in the form of theinvention first described by means ofthe stem 19 of the indicator, whichprojects upward above the top of the filler and indicates exactly thelevel of the water within the space between the outer wall of the potand the inner receptacle.

By providing a tube to permit free circulation of air between thecoffee-receiver and the lower portion of the inner receptacle of the 1coffee-pot the necessity of providing any aper- I or jacket and acofl'ee-receptacle spaced from the inner walls of the shell andterminating at its upper end in an outward-projecting flange secured tothewall of the shell, of a percolator provided with a shoulder to engagethe flange of the receptacle and having a reduced portion projectingdownward below the shoulder, a foraminous plate disposed near the lowerend of the percolator, a detachable filtering medium combined with thelower end of the percolator,'and an air-pressure-equalizing pipe havingits upper end disposed near the top of the receiver and its lower endprojected into the receptacle.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

DANIEL H.7TALBERT,

Witnesses:

FRANK B. SINEX, CHARLES B. SINEX.

